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单词 sexduodecimal
释义

> as lemmas

sexduodecimal
sexduodecimal adj. [after French sexduodécimal ( R. J. Haüy Traité de minéral. (1801) I. 189)] Crystallography Obsolete rare (of a crystal) having six prismatic faces parallel to the central axis and twelve faces at each pyramidal end, or vice versa.
ΚΠ
1813 F. Accum Elements Crystallogr. 279 Sexduodecimal. Ex. Sexduodecimal carbonated lime.
1816 R. Jameson Treat. External Characters Minerals (ed. 2) 201 Sex-decimal.., when the planes that belong to the prism..and those which belong to the two summits, are the one six, and the other ten in number, or vice versa.. . In the same manner, we say, octo-decimal, sex-duodecimal [etc.].
extracted from sex-comb. form
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as lemmas
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更新时间:2024/11/13 13:39:57